Peroxide crosslinking of Ziegler-Natta thermoplastic polyolefins

Peroxide crosslinking of Ziegler-Natta thermoplastic polyolefins

A range of reactor grade TPO alloys (PP/EPM alloys from Ziegler‐Natta catalysis) were studied in order to evaluate their dynamic cross‐linkability, using a peroxide system. The amount of ethylene content in EPM rubber ranged from 28 to 77 wt%, to investigate the competition between vis‐breaking and...

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Veröffentlicht in:Polymer engineering and science 2004-01, Vol.44 (1), p.131-140
Hauptverfasser: Bacci, Dino, Marchini, Roberta, Scrivani, Maria Teresa
Format: Artikel
Sprache:eng
Schlagworte:
Applied sciences
Chemical reactions and properties
Crosslinking polymerization
Crosslinking, vulcanization
Exact sciences and technology
Organic polymers
Physicochemistry of polymers
Polymers
Thermoplastic composites
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Zusammenfassung:A range of reactor grade TPO alloys (PP/EPM alloys from Ziegler‐Natta catalysis) were studied in order to evaluate their dynamic cross‐linkability, using a peroxide system. The amount of ethylene content in EPM rubber ranged from 28 to 77 wt%, to investigate the competition between vis‐breaking and cross‐linking during the peroxide reaction. Processing temperature and different peroxide/coagent ratios were the parameters varied in the present work. Cross‐linking degree was evaluated with Compression Set measurements and Dynamic Mechanical Analysis. It was therefore possible to find a correlation between the two analytical techniques. Feasibility of TPV rubbers with Compression Set at about 50% (22 h, 70°C) was demonstrated.
ISSN:0032-3888
1548-2634
DOI:10.1002/pen.20012